Title:
【発明の名称】nビットのソースワードをmビットの対応するチャネルワード(およびこの逆)に符号化/復号化するための装置
Document Type and Number:
Japanese Patent JP2003532338
Kind Code:
A
Abstract:
A device is provided for encoding a stream of data bits of a binary source signal (S) into a stream of data bits of a binary channel signal (C1), wherein the bit stream of the source signal is divided into n-bit source words (x1, X2). The device includes converting means adapted to convert the source words into corresponding m-bit channel words (y1, y2, y3). Each n-bit source word together with another n-bit source word forms a pair of source words. The values of the n-bit source words differ only in the value of the bit in the qbit position, q being a constant. The pairs of source words are divided into a first part of pairs and a remaining part of pairs. The converting means are further adapted to convert n-bit source words belonging to the first part of pairs into corresponding m-bit channel words, in such a manner that the conversion for each of the n-bit source words is parity preserving, and to convert n-bit source words belonging to the remaining part of pairs into corresponding m-bit channel words, in such a manner that the conversion for each of the n-bit source words is parity inverting. A decoding device is also provided for decoding the channel signal obtained by means of the encoding device.
Inventors:
Kaulman Josephus A H
Application Number:
JP2001579504A
Publication Date:
October 28, 2003
Filing Date:
April 02, 2001
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
G11B20/14; H03M5/14; H03M7/14; H04L25/49; (IPC1-7): H04L25/49; G11B20/14; H03M7/14
Attorney, Agent or Firm:
Masao Sawada